Automobile radiator-thermometer.



E. A. LARSON. AUTOMOBILE RADIATOR THERMOMETER.

APPLICATION FILED JULY 6, I914.

. 1,136,682, Patented Apr. 20, 1915.

imam??? A? die card ALZCZ W011.

mural) STATES OFFICE.

EDWARD A. LARSON, or CHICAGO, ILIiiNQIS, AssiGNoR fro STEWART-WA NER SPEED- o aE'rER coRronAa'IoN, or cHIc emILLnvoIs, A CORPORATION or VIRGINIA.

' v AUTOMOBILE BADIATQR-THEBMOMETER.

To an whom it ma concern:

. Be it known that I, EDWARD A. LAnsoN,.-a

citizen of the United States, residing at Chicago, 'in the county of Cook and State of Specification Letters latent. Pate tedAp g2Q1915. Applicationfiled m '6, 1914. Serial No. 849,075 i rather than merely the temperature in the air space. above the water, which would not be a reliable index of conditions in the engme, Such means consist in a small cup or 5 Illinois, have invented new and useful Ini reservoir, 8, secured in the filler neck, 5, by 60 'p'rove'ments in Automobile Radiator-Thermeans of radially projecting spring arms, 5 'mometers', of which the following'is a, specifiwhich. may. position the device merely by cation, reference beinghad to the 'accomtheir frictional hold, or which may be solpanying drawings, forming ,a part thereof. dered in position if desired. Leading from The purpose of this invention is to prothe open bottom of the receptacle, 8, there is 55 Vide means for conveying the cooling water shown a tube or pipe, 10, which should be of the circulating system of an'automobile of somewhat flexible material, so that when engine to a point which may beatsome inserted through the filler neck it can be times above the normal level of the water bent to reach through the radiatorinto the in suchsystem, with a, view to bringing pipe, 11, leading from the engine cylinder 7 such water into close proximity to a ther- Jackets not shown. It, will be understood mometer whose purpose is to warn. the driver that the water comingt-hrough the pipe, 11, of temperature conditions, in the engine directly fromthe engine is necessarily the itself. v hottest water in the system, and thus fur- The invention comprises the features and nishes the most accurate index of conditions elements described and shown in the drawin the engine itself. The pipe, 10, is intendings as indicated by the claims. ed to carry a portion of such water up into In the drawings :Figure 1 is an eleva- 'the cup, 8, from which it may overflow back tion'of a certainportion of an automobile into the radiator itself, whence it will be 25 radiator, showing the thermometer device circulated back to the engine in the usual so applied thereto with its indicating means manner. To effect-such operation, the pipe, arranged outside the radiator for obse'rva- 10, is provided near its lower end with a tion by the driver. Fig. 2 is a sectionon a check valvc, 12, opening towarddzhe cup, 8,

larger scale, taken as indicated at line 22 so that any pressure exerted by the How of on Fig. 1. i water into the radiator (whether such flow a5 The thermometer device shown in the be caused by a positive circulating pump or drawings is of a metallic type having a heatmerely by the well understood thermo-syresponsive element, 1, consisting of a biphon action) will operate to open the check Ynetallic bar whose curvature is varied by valve, 12,'an d the valve will operate to trap 35, changes of temperature, and which is operall the water passed through it, until the atively connected by mechanical means not water level in the pipe, 10, and cup, 8, rises shown so as to actuate an indicator needle, to the brim of the cup. It .will be under- 2, causing it to traverse a scale, 3, which may stood that in a very few minutes running of he graduated in terms of temperature. This the engine, the cup, 8, will be filled with 40 device is conveniently mounted as shown in water in this manner, and will be kept filled Fig. 2 in the filler cap, 4, which closes the with a constantly changing supp y t neck, 5, of the radiator, 6. -On account of Water direct from the engine so long as the the wide variation in the length of the filler circulation is kept up; that is. so long as the neck, 5, as provided on different makes of engine is'keptrunning.

1 machines, it is found impracticable to make I claim the frame, 7, which carries the element, 1, 1. A device for indicating the temperalongenough to certainly support said eleture of the cooling water of an internal ment, 1', at a position below the normal water combustion engine, comprising, in combinalevel in-all radiatorsmThe present invention with the radiator, an upwardly-open 50 tion is designed, therefore, to provide means receptacle for water adapted to be suspend- 106 which shall elevate aportion of the water ed within the radiator below the filling to a position where it will surround the mouth thereof; a tube discharging into said eat-responsive element, 1, so that the'readreceptacle and extending within the radu ings of the instrument may indicate the acator to the inlet orifice thereof; a check tual'temperatureof the water-at all times, valve in said tube opening for flow there- 110 trudes into said receptacle, and a temperature -indicating element which is exposed to view outside the cap.

' 2. A device for indicating the temperature of the cooling water of'an internal combustion engine, comprising, in combination with the radiator, a receptacle for water adapted to be' inserted through the radiator filling mouth and tobe suspended within the receptacle elow said mouth; a

\ tube connected with said receptacle fordischarge thereinto, extending from said re- ]ceptacle within the radiator to the inlet orifice thereof, and having a funnel inlet mouth positioned for receiving water flowing for discharge into the radiator through said inlet orifice, and a thermometer mounted on the radiator cap having its heat-responsive element protruding ipt o gg ig l receptacle and its temperature-indicating ii ment exposed to view outside the'ca 3. A device for indicating the temperature of the cooling water of an internal com- 7 extending thence within the radiator to thc vicinity of the inlet orifice thereof, and pro- 1 1 vided with a funnel receiving mouth 0-3. sitioned for receivin water flowing 'for 's-. charge through sai orifice into the radiator; a check valve in said tube opeiiing for, flow therethrough toward the receptacle;

and adapted to be seated by reverse flow; a a 1 a thermometer andmeans for mounting it t on the radiator ca with its heat-respom sive element protru 'ng into said receptacle j and "its temperature-indicating parts ex-A' posed to-view oiltside the radiator.

In testimonviwhereof, I have hereunto set 7 my hand at Chicago, Illinois, this 3rd digitof July, 1914.

Witnesses:

G. B. SMITH, H. BLIVEN.

- EDWARD A. LARSON"? 

